Piston for oil-pump governors.



C. W. SHINTON.

PISTON FOR OIL PUMP GOVERNORS,

APPLICATION rum) AUG. 9, 1012.

1,073,822. Patented Sept.23,1913.

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CHARLES W. SHINTON, or BELLEVILLE, ILLINoIs.

PISTON FOR OIL-PUMP GOVERNORS.

Specification of Letters Patent.

Patented Sept. 23, 1913.

Application filed August 9, 1912. Serial No. 714,294.

To all whom it may concern:

Be it known that I, Cnannns WV. SHiN'roN, a citizen of the United States, residing at Belleville, in the county of St. Clair, State of Illinois, have invented certain new and useful Improvements in Pistons for Oil- Pump Governors; and I do hereby declare the following to be a -toll, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to pistons for use in oil pump governors.

The object of the invention resides in the provision of a piston 01 the character named which will ett'ectively prevent the escape of oil from the pressure end of the cylinder to the non-pressure end thereof and therefore at all times accurately regulate the action of the pump in. accordance with the pressure 01'; oil in the delivering main and reservoir.

A further object of the invention resides in the provision of a piston of the type named which will be durable, ellicient in action and comparatively inexpensive to manufacture.

WVith the above and other objects in view the invention consists in the details of construction and in the arrangement and combination of parts to be hereinafter more fully described and particliilarly pointed out in the appended claims.

In describing the invention in detail reference will be had to the accompanying drawings wherein like characters of reference denote corresponding parts in the several views, and in which Figure 1 is a side elevation of an oil pump governor having the improved piston associated therewith. Fig. 2 a partial longitudinal section of what is shown in Fig. 1. Fig. 3 a longitudinal section through the piston detached, and Fig. 4 a detail perspective view of the perforated disk which constitutes the pressure end of the piston head.

Referring to the d 'awi'ngs, the improved piston is shown comprising a piston rod A, and a piston head B, the latter being mounted for reciprocation in the usual cylinder C. The piston rod A extends through one end of the cylinder G and has formed thereon an annular flange 10 disposed exteriorly ot the cylinder C. The end of the cylinder C remote from the piston red A is connected to the desired oil main by means of a pipe 11 whereby the 1)ressurc ot the oil entering the cylinder G through said pipe 11 will be exerted against the piston head 13. Mounted on the end of the cylinder C re mote from the pipe 1.1 is a yoke 12 of U- shape and having threaded in the bight portion thereof a tubular screw 13 provided with a hand wheel 11- at one end and a latoral flange 15 at the other end, said flange being disposed between the arms of the yoke 12. The piston red A passes through the bore of the screw 13 and is operatively connected to the throttle 16 which controls the passage ()1 steam to the oil pump. .lGncircling the piston red A. and having one end bearing against the flange 1.0 and the other end against the flange .15 is a spring 17, said spring constantly lending to force the piston head 15 toward the pipe 11 and the tension of said spring being readily regulated by the manipulation of the screw 13 through the medium of the hand wheel 1 1-. The piston head B is shown as comprising a head 18 held against movement toward the end of the piston red A. ltljdCOIlt the throttle 1G by tapering the red at one end. Mounted upon the piston red A at the end thereof adjacent the pipe 11 is a disk 20 provided with a plurality of perforations 2t. l lncircling the piston red A between the collar 18 and the disk 20 is an inner packing ring 22 of the split type and encircling this packing ring 22 are packing rings 23 and 21 also of the split type, said packing rings 23 and 21 hearing against the wall. of the cylinder 0. The packing rings 22, 23 and 21 are secured between the head 18 and the disk 20 by means of a nut 2:) threaded on the end of the piston rod A adjacent the pipe 1.1. It will be noted that the perjlm-alions 21 ot the disk 520 are disposed imvardly ol the packing rings 22, 23 and 24 so that the oil under pressure entering the cylinder C will pass through the perforations 21 and bear against the inner face of the packing ring 22 which will result in the expansion of said packing ring and in turn the expansion of the packing rings 23 and 2 1 so as to ell'ect a tight joint between the packing rings 23 and 24 and the cylinder C and prevent the passage of oil by the piston head ll to the non-pressurc end 0f the cylinder C.

\Vhat I claim is:-

In a piston 'lor oil pump governors, a pis ton rod, a head fixed on said piston rod in spaced relation to the pressure'end ot' the piston, a perforated disk slidably mounted on the piston rod at the pressure end of the piston, a split ring encircling the piston rod between the head and perforated disk, said 7 ring having its inner face entirely out of engageinentwith the disk and disposed throughout its extent outwardly of the perforations of said disk and in spaced relation to the piston rod a plurality of split metallie packing rings encircling the first named packing ring and having a combined Width Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

equal to the first named packing ring, and means for forcing the perforated CllSk against the ad aCent edges of the packing ring to clamp said rings between the disk 15 and the head.

In testimony whereof, I affix my signa ture, in presence of two witnesses. I

CHARLES W. SHINTON. WVitnesses:

BEN. LANTZ, JOHN MERRIMAN.

Washington, .D. G. 

